US might think twice about it because such attack could spark a nuclear warfare.You guys would probably get a ton of guns and ammo to fight the Russian just like its happening with Ukraine.Russian army is overrated.Their population is small for such a big territory.They are only a real threat because of their huge nuclear arsenal.
canada could likely deal with it on it's owm, would likely become a shared issue cause canada and america share the same land and waterways
not like by ownership but by geography right
you think the us would be fine with russia going into their continent and attacking the country right next to them, like who do they think would be next target if canada is taken down
it's better odds at winning if the american nations defend their land from russian invaders